<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body>
    <script>
      //new String new Number new Boolean
      // const date = new Date();
      // console.log(date);
      // console.log(typeof date);
      // console.log(date * 1);

      // const hd = Date();
      // console.log(hd);
      // console.log(typeof hd);
      // console.log(hd * 1);

      // const date = Date.now();
      // console.log(date);
      // const start = Date.now();
      // for (let i = 0; i < 2000000000; i++) {}
      // const end = Date.now();
      // console.log((end - start) / 1000 + "秒");
      // console.time("for");
      // for (let i = 0; i < 2000000000; i++) {}
      // console.timeEnd("for");

      // const date = new Date("1990-9-22 3:22:18");
      // console.log(date);
      // console.log(date.getMonth());

      // const date = new Date(1990, 2, 22, 13, 22, 19);
      // console.log(date);
    </script>
  </body>
</html>
